Abstract:
:Forty-one chronically T. cruzi-infected male adult albino rats with normal resting ECG were submitted to the ajmaline test (1 mg/kg body weight injected into the dorsal vein of the penis). Twenty-one similar noninfected animals served as controls. Ajmaline induced the following ECG alterations in control rats: A decrease in heart rate, an increase in heart rate, an increase in P-wave duration, an increase in PR interval, lengthening of the QRS complex, and left axis deviation in 33%, 28%, 14%, 90%, 100%, and 33% of the animals, respectively. Ajmaline evoked similar alterations in 29 of 41 (71%) T. cruzi-infected rats. However, 12 of 41 (29%) infected rats showed ECG changes of a magnitude not seen in controls: P-wave enlargement, first-degree AV block, lengthened QRS complex, and first-degree AV block plus lengthened QRS complex in 7%, 12%, 14%, and 4% of the animals, respectively. Microscopical lesions were not found in control rats. However, 22 of 41 (53%) infected rats were found to have the following pathological lesions: mononuclear cell infiltrate, necrosis, myocyte vacuolization, and interstitial fibrosis in 56%, 39%, 29%, and 7% of the animals, respectively. By comparing the ECG changes evoked by ajmaline not seen in controls with the concomitant pathological lesions, the ajmaline test was found to have 54% sensitivity, 100% specificity, and 100% positive predictive value. Thus, the ajmaline test appears to be useful for unmasking myocardial disease and therefore may be considered a potential method for the full characterization of the indeterminate form of Chagas' disease in experimental animals.
journal_name
Cardiovasc Drugs Therjournal_title
Cardiovascular drugs and therapyauthors
Bestetti RB,Soares EG,Sales-Neto VN,Oliveira JSdoi
10.1007/BF01883861subject
Has Abstractpub_date
1989-04-01 00:00:00pages
171-6issue
2eissn
0920-3206issn
1573-7241journal_volume
3pub_type
杂志文章abstract:PURPOSE:Protein kinase C alpha (gene: PRKCA) is a key regulator of cardiac contractility. Two genetic variants have recently been discovered to regulate PRKCA expression in failing human heart tissue (rs9909004 [T → C] and rs9303504 [C → G]). The association of those variants with clinical outcomes in patients with hea...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章
doi:10.1007/s10557-019-06909-6
更新日期:2019-12-01 00:00:00
abstract::The time course of myocardial ischemia was studied in canine myocardium by electron microscopy. Ischemia of the myocardium produces ultrastructural alterations of mitochondria, nuclei, contractile apparatus, and the SR- and T-tubular system that are accompanied by loss of glycogen and intracellular edema. These change...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章,评审
doi:10.1007/BF00054248
更新日期:1988-05-01 00:00:00
abstract::Male Japanese white rabbits were fed a restricted amount (100 g/head/day) of an atherogenic diet containing 0.2% cholesterol and 6% peanut oil during an 8-week experimental period. Atherosclerotic lesions, characterized by intimal thickening with lipid deposition, were produced by de-endothelialization of the rabbit a...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章
doi:10.1007/BF00878516
更新日期:1993-04-01 00:00:00
abstract::The aim of this study was to compare the pharmacokinetics and antiarrhythmic activity of dihydroquinidine and quinidine in 14 patients (11 men, 3 women, aged 28 to 67 years) with heart disease and chronic, stable, high-frequency premature ventricular beats (PVB) (greater than 100/hr). A randomized, double-blind, cross...
journal_title:Cardiovascular drugs and therapy
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/BF00054209
更新日期:1988-12-01 00:00:00
abstract::Tracer techniques have provided new insight in cardiology by allowing noninvasive studies of myocardial perfusion, function, metabolism, and, more recently, ligand-receptor interaction. Positron emission tomography allows accurate quantification and the use of natural substrates labelled with 11C, 13N, or 15O. Myocard...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章,评审
doi:10.1007/BF00051291
更新日期:1990-08-01 00:00:00
abstract:PURPOSE:To evaluate whether aleglitazar (Ale), a dual PPARα/γ agonist, has additive effects on myocardial protection against ischemia-reperfusion injury. METHODS:Human cardiomyocytes (HCMs), cardiomyocytes from cardiac-specific PPARγ knockout (MCM-PPARγ (CKO) ) or wild type (MCM-WT) mice were incubated with different ...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章
doi:10.1007/s10557-016-6650-9
更新日期:2016-04-01 00:00:00
abstract::The original version of this article unfortunately contained a mistake. There was a typo in the second sentence of the paragraph under the section Was the Dose of Drugs Fair?; "320 mg twice a day" should read "160mg twice a day". The corrected paragraph is shown below. ...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章,已发布勘误
doi:10.1007/s10557-018-6834-6
更新日期:2018-12-01 00:00:00
abstract::The purpose of this study was to evaluate the effect of trimetazidine on late potentials in patients with acute myocardial infarction. A total of 60 patients (52 males, mean age 55 +/- 2 years, and 8 females, mean age 54 +/- 1.8 years) with the diagnosis of acute myocardial infarction were included in this study. The ...
journal_title:Cardiovascular drugs and therapy
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1023/a:1007740311072
更新日期:1999-04-01 00:00:00
abstract::Inhibition of the renin-angiotensin system has been a highly successful therapeutic approach for the prevention of hypertension-related end organ damage. Angiotensin converting enzyme inhibitors and angiotensin II receptor blockers lower blood pressure and reduce morbidity and mortality in patients with cardiovascular...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章,评审
doi:10.1007/s10557-010-6278-0
更新日期:2011-02-01 00:00:00
abstract:PURPOSE:Epidemiologic and clinical research suggests important gender-related differences in the prevalence, presentation, associated conventional and non-conventional risk factors, management and outcomes of coronary heart disease (CHD) patients. Adequate data is not available for Indian population where prevalence of...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章
doi:10.1007/s10557-015-6594-5
更新日期:2015-08-01 00:00:00
abstract::Vascular endothelium gene expression regulates blood-vessel wall interactions, vascular permeability, smooth muscle cell growth and tone. The possibility to introduce exogenous DNA or RNA sequences in endothelial cells represents a novel therapeutic approach of vascular disease. The aim of the work was to investigate ...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章
doi:10.1023/a:1011154616992
更新日期:2001-01-01 00:00:00
abstract::To assess the effect of antihypertensive drugs on aortic distensibility, we evaluated the aortic distensibility of 33 hypertensive patients before and after antihypertensive treatment by using cine magnetic resonance imaging. Thirty three hypertensive patients were divided into three groups and treated for 12 weeks wi...
journal_title:Cardiovascular drugs and therapy
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1023/a:1007711617112
更新日期:1999-07-01 00:00:00
abstract::Suppression of formation of angiotensin II (A-II) is thought to be a major contributor to the hemodynamic response to angiotensin-converting enzyme inhibition (ACE-in) therapy. However, angiotensin II (A-II) plasma levels may rebound during ACE-in treatment. The study sought to verify the feasibility, safety, and tole...
journal_title:Cardiovascular drugs and therapy
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1023/a:1007739412802
更新日期:1998-05-01 00:00:00
abstract:INTRODUCTION:Atrial dilatation is commonly associated with atrial fibrillation (AF), but the electrophysiological mechanisms and the implications for anti-arrhythmic therapy are poorly understood. In a model of acute stretch-related AF in isolated rabbit hearts, we evaluated the electrophysiological effects of three di...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章
doi:10.1007/s10557-007-6001-y
更新日期:2007-02-01 00:00:00
abstract:PURPOSE:A multicentre, randomized, double-blind, placebo-controlled, parallel-group study aimed to define the potential positive effect of dipeptidyl peptidase-4 inhibition on left ventricular systolic function (LVSF) beyond glycemic control in type 2 diabetes mellitus (T2DM) (DYDA 2™ trial). METHODS:Individuals with ...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章
doi:10.1007/s10557-019-06898-6
更新日期:2019-10-01 00:00:00
abstract::Elgodipine is a new second-generation dihydropyridine calcium antagonist. Its hemodynamic and antiischemic properties were evaluated in a single-blind, placebo-controlled trial in 22 males with chronic stable angina. Coronary artery disease was angiographically confirmed. Measurements were performed with a Swan-Ganz t...
journal_title:Cardiovascular drugs and therapy
pub_type: 临床试验,杂志文章
doi:10.1007/BF00878092
更新日期:1995-08-01 00:00:00
abstract:PURPOSE:Ranolazine (RAN) added to amiodarone (AMIO) has been shown to accelerate termination of postoperative atrial fibrillation (POAF) following coronary artery bypass surgery in patients without heart failure (HF). This study aimed to investigate if treatment efficacy with AMIO or AMIO + RAN differs between patients...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章,随机对照试验
doi:10.1007/s10557-018-6832-8
更新日期:2018-12-01 00:00:00
abstract:AIMS:The primary ain of this study was to investigate the effect of carbachol on ventricular repolarisation in an intact animal heart. METHODS:In five sheep, carbachol was administered to the left circumflex coronary artery (LCX) at 1.0 and 2.5 micromol/ml/min respectively for 3 min. Multiple unipolar ECGs were acquir...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章
doi:10.1023/a:1027324412869
更新日期:2003-07-01 00:00:00
abstract:BACKGROUND:Many studies have demonstrated a gap between guidelines for the prevention of cardiovascular disease (CVD) and their implementation in clinical practice. AIM:The PEGASE education program has been devised with an aim to improve the management of patients at high risk of CVD. METHODS:In a multicentre study c...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1007/s10557-008-6137-4
更新日期:2008-12-01 00:00:00
abstract::Milrinone is shown in 10 patients to be a valuable pharmacological bridge to heart transplantation; it can stabilize and improve decompensated chronic heart failure (CHF) in cases where the response to beta-agonists is inadequate. One patient who had suffered an acute myocardial infarction with heart failure resistant...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章,评审
doi:10.1007/BF00877820
更新日期:1993-08-01 00:00:00
abstract:BACKGROUND:Although Takotsubo syndrome (TS) was once considered to be rare and largely benign, it is now recognized to represent a major cause of cardiac morbidity and mortality, especially in ageing women. The biochemical precipitant of attacks of TS is an increase in catecholamine concentrations within the myocardium...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章
doi:10.1007/s10557-019-06918-5
更新日期:2020-02-01 00:00:00
abstract::This study was designed to compare once-daily administration of 5-10 mg amlodipine with two daily doses of 40 mg sustained-release isosorbide dinitrate in 59 patients with stable angina using a randomized, double-blind, crossover study design. Anginal episodes, nitroglycerin consumption, and possible adverse events we...
journal_title:Cardiovascular drugs and therapy
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1023/a:1007726722284
更新日期:1997-11-01 00:00:00
abstract::Angiotensin-converting enzyme (ACE) inhibitor therapy has been associated with a substantial (> or = 20%) reduction in the risk of major ischemic events in two recent clinical trials with long-term follow-up: Studies of Left Ventricular Dysfunction (SOLVD) and the Survival and Ventricular Enlargement (SAVE) study. Par...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章,评审
doi:10.1007/BF00877749
更新日期:1995-02-01 00:00:00
abstract::Based on a retrospective analysis of the DAVIT II database, we attempted to propose subgroups of post-infarction patients with heart failure, who might benefit or not benefit from antiischemic medical intervention. In DAVIT II, patients were randomized in a double-blind fashion to either verapamil 360 mg/day or placeb...
journal_title:Cardiovascular drugs and therapy
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1007/BF00877400
更新日期:1994-12-01 00:00:00
abstract::Free radical injury may contribute to the delayed postoperative recovery of myocardial metabolism and ventricular function after elective coronary artery revascularization. This clinical study was designed to evaluate, in stable angina patients having aortocoronary bypass surgery, whether orally administered alpha-toc...
journal_title:Cardiovascular drugs and therapy
pub_type: 临床试验,杂志文章
doi:10.1007/BF00054753
更新日期:1991-03-01 00:00:00
abstract:OBJECTIVE:The natural history of pediatric patients with severely symptomatic neurocardiogenic syncope is poorly defined respect to the likelihood of remission or symptomatic recurrence along time. We undertook this study to investigate the likelihood of clinical relapse, and to assess the effect of prophylactic pharma...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章
doi:10.1023/a:1011179014084
更新日期:2001-03-01 00:00:00
abstract::Insertion (I)/deletion (D) polymorphism of the ACE gene has been reported to be involved in various cardiovascular diseases. We investigated prospectively whether the response to the ACE inhibitor fosinopril varied according to the ACE genotype in previously untreated Greek hypertensive patients. After a 4-week observ...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章
doi:10.1023/a:1007820401377
更新日期:2000-08-01 00:00:00
abstract::Heart rate varies with respiration, blood pressure, emotion, etc., and heart rate variability (HRV) is presently one of the best indices to predict fatal issues in cardiac failure and after myocardial infarction. HRV depends on various reflexes. In addition, parallel studies of HRV and the myocardial adrenergic and mu...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章,评审
doi:10.1007/BF00053024
更新日期:1997-01-01 00:00:00
abstract::The purpose of this study was to examine the effects of the angiotensin-converting enzyme (ACE) inhibitor cilazapril on the elastic properties of the aorta. A standard diuretic antihypertensive drug, hydrochlorothiazide, served for comparisons. Increased aortic stiffness leads to a reduction of the buffering windkesse...
journal_title:Cardiovascular drugs and therapy
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/BF00051130
更新日期:1996-03-01 00:00:00
abstract:PURPOSE:The PPAR-alpha agonists (fibrates) are commonly used in the treatment of dyslipidemia. It has been hypothesized that the cardio-protective effects of fibrates are partially due to immunomodulatory effects. However, there is a paucity of data regarding the effect of fibrates on neutrophilic chemokines such as ep...
journal_title:Cardiovascular drugs and therapy
pub_type: 杂志文章
doi:10.1007/s10557-011-6368-7
更新日期:2012-04-01 00:00:00